LP38691SD-3.3 Datasheet, PDF (1/27 Pages) Texas Instruments – LP38693 500mA Low Dropout CMOS Linear Regulators Stable with Ceramic Output Capacitors

LP38691, LP38693
www.ti.com
SNVS321K – JANUARY 2005 – REVISED APRIL 2013
LP38691
LP38693 500mA Low Dropout CMOS Linear Regulators
Stable with Ceramic Output Capacitors
Check for Samples: LP38691, LP38693
FEATURES
1
•2 All WSON Options are Available as AEC-Q100
Grade 1
• 2.0% Output Accuracy (25°C)
• Low Dropout Voltage: 250 mV @ 500mA (typ,
5V out)
• Wide Input Voltage Range (2.7V to 10V)
• Precision (Trimmed) Bandgap Reference
• Ensured Specs for -40°C to +125°C
• 1µA Off-State Quiescent Current
• Thermal Overload Protection
• Foldback Current Limiting
• PFM, SOT-223 and 6-Lead WSON Packages
• Enable Pin (LP38693)
APPLICATIONS
• Hard Disk Drives
• Notebook Computers
• Battery Powered Devices
• Portable Instrumentation
DESCRIPTION
The LP38691/3 low dropout CMOS linear regulators
provide tight output tolerance (2.0% typical),
extremely low dropout voltage (250 mV @ 500mA
load current, V_OUT = 5V), and excellent AC
performance utilizing ultra low ESR ceramic output
capacitors.
The low thermal resistance of the WSON, SOT-223
and PFM packages allow the full operating current to
be used even in high ambient temperature
environments.
The use of a PMOS power transistor means that no
DC base drive current is required to bias it allowing
ground pin current to remain below 100 µA
regardless of load current, input voltage, or operating
temperature.
Dropout Voltage: 250 mV (typ) @ 500mA (typ. 5V
out).
Ground Pin Current: 55 µA (typ) at full load.
Precision Output Voltage: 2.0% (25°C) accuracy.
Typical Application Circuits
V_IN
1 PF *
V_IN
V_OUT
LP38691
SNS^**
GND
V_OUT
1 PF *
V_IN
V_EN
1 PF *
V_IN
V_OUT
V_EN
LP38693
SNS^**
GND
V_OUT
1 PF *
* Minimum value required for stability.
**WSON package devices only.
1
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2
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
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